South Korea's Joint Chiefs of Staff said in a statement it detected several ballistic missile launches from North Korea's capital region around 7:50 a.m. It stated that the missiles flew approximately 560 miles and that South Korean and U.S. authorities were analyzing the details of the launches.

The debut followed the North’s first test of a new surface-to-air missile and the arrival of a U.S. nuclear-powered attack sub for a port call in South Korea.

Analysts in Seoul say suspicions of Russian assistance are difficult to dismiss. Read more at straitstimes.com. Read more at straitstimes.com.

North Korea's state media released photos Thursday of what it said was the hull of a nuclear submarine. Its leader denounced South Korea's plans to build its own subs as "an offensive act."

North Korea on Thursday released new images of what it claims is its first nuclear-powered submarine, a massive vessel equal in size to some of the United States Navy’s attack subs.